Grinding-machine



(No Model.)

W. C. F. STGKEL.

GRINDING MACHINE.

No. 415,886. Patented Nov. 26, 1889.

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L'Zy? hw UNITED STATES PATENT OFFICE.

VILLIAM C. F. STCKEL, OF ROCKAFELLER, 'ILLINOIS GRINDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 415,886, dated November26, 1889.

Application filed J'uly 3,1889. Serial No. 316,431. (No model.)

To all whom, it may concern.-

Be it known that I, WILLIAM C. F. STGKEL, a citizen of the Unitedstates, residing at Rockafeller, in the county of Lake and State ofIllinois, have invented a new and useful lmprovementinGrinding-Machines, of which the following is a specification.

My invention relates particularly to improvements in emerygrinding-machines, and more especially to machines of this class whichare designed to be used for general workas for sharpening tools of allkinds, polishing small surfaces, and the like.

rlhe different degrees of hardness of the metals to be ground and thevarious kinds of work to be performed by the grinding-Inachinenecessitate the employment in a shop I of emery or corundum wheels ofdifferent deto be removed from the machine whenever the work to be donenecessitated the employ- Inent of a disk of different grain or textureand replaced by the one required. In abusy shop, where thegrindi11g-machine is Inore or less constantly in use, the frequentchanges of the grinding-disks that have to be made, :for the reasonsstated, cause delays which are both annoying and expensive; and it is myobject to overcome this objection by providing an emery grinding-machineof the above class wherein any one of a number of differentlyconstitutedgrindingdisks may be brought into operative position without appreciabledelay. It is further my object to provide such a machine of peculiar andimproved construction, which will render it economical to manufacture,compact, durable, and otherwise desirable.

To the above ends my invention consists in the general and specificconstruction and combination of parts, substantiallyas claimed.

In the drawings, Figure l is atop plan view of au emery-grindin gmachine of Iny improved construction; Fig. 2, a vertical sectional Viewof the same, showing parts in elevation and with other parts left out toavoid confusion.

A is the table of the machine, comprising .both tops B B.

the legs i and the double top B B. Below the table is a power-shaft C,provided with the fast and loose pulleys C and driving-pulley 02. Abovethe pulley C2the table is provided with an opening s, extending throughSurrounding the opening S, and rigidly secured upon the top B', is aflanged ring D, having the inner peripheral rectangular surface r,affording a socket, and

the outer peripheral groove yr.

E is a rotatory annular support in the form of a short cylinder, havinga flange E at its top and resting at its base loosely in the socketafforded by the surface r of the ring D. Around the outer circumferenceof the support E and secured thereto is a series of short brackets orlingers q, which extend over the surface of the ring into the groove rand serve to secure the support E without interfering with its rotationin the ring D. On its inner circumference the support E carries a seriesof brackets F, preferably of the form shown, which extend upward withtheir free ends in the plane of the surface of the ring E', and affordbearings p for radially-disposed spindles G, which extend toward theiropposite ends through bearings p. Each spindle Gis provided between itsbearings p p with a pulley G', and toward its outer free end it has afast flange o, against whicha grinding-disk Z may be placed and held Inposition by a collar o and nut 02, all In a common manner.

The machine may be constructed with any desired number of spindles G,and each spindle should carry a differentlyconstituted grinding-disk.the drawings eight spindles are shown, which will serve to hold as manydifferent grindingdisks as would ordinarily be found necessary. W'hen itis desired to use a certain disk of the set, the support E is turned tocause the spindle carrying the required disk to extend above the openings, whereby its pulley G is directly above the Vdriving-pulley 02. Thedriving-belt H, which runs over the pulley C2, is then slipped over thepulley G when the grinding-disk will rotate with the turning of theshaft C.

The tops B B are hinged together at n, and toward their opposite ends isa rock-shaft lm, journaled in the top B. The rock-shaft m is In themachine illustrated inw IOO provided with a crank m and carries one ormore cams m2, which extend against the under side of the `top B', forthe latter to rest upon, and which operates with the rocking of theshaft m to raise or lower the top B. \Vhen the top B is raised, it alsoraises the support E, which produces tightening of the belt over thepulley G. Adjacentto the operative position of the pulleys G is a loosepulley Z on a fixed standard Z secured to the top B, and connected withthe rock-shaft m is the automatic belt-shifting mechanism I, comprisinga crank-arm k, rigid upon the rock-shaft m, a horizontally-disposed rod7a', pivotally connected at one end to the end of the crankarm andsimilarly connected at its opposite end to a bent rod or frame e',extending vertically then laterally in a horizontal direct-ion through aguide opening (not shown) in the standard Z. On itshorizontally-extending portion the rod 'L' carries pins i', whichproject on opposite sides of the belt.' To slacken the belt II anddisengage the pulley G, the crank fm. is turned to rock the caln or camsm2 to the right, which lowers the top B vand causes immediate slackingof' the belt. Further turning of the crank rotates the arl'n lo, whichforces along the rods Zo and i, causing the latter to slide through itsguideopening in the standard Z and carry with it the belt, causing thelatter at the end of the operation to rest upon the pulley Z, which isin the plane of the pulley G when the top B is lowered. The initialmovement of the crank-arm 7c being in a downward direction, the shiftingof the belt does not commence until the latter is slackened. Then thebelt is thus removed from the pulley G', the support E may be turned tobring another grinding-disk into position, when by turning the crank mto raise the top B again the belt II, with the first movement of thearln Zr, is shifted upon the new pulley G.

To fasten the support E when a grindingdisk is brought into operativeposit-ion and prevent its being turned by the pressure', brought to bearagainst it by the article which is being ground, I providea pivotallatch on the top B which may be caused to engage projections ZL on therotatory support below each spindle G.

It is too obvious to require illustration that the form of gearingbetween the drivingport on the fixed support, a fixed power-shaft anddriving-pulley, and a series of spindles, each carrying a grinding-disk,and belt-pulley mounted on the rotatory support and adapted to beconnected in turn to the driving-pulley, substantially as and for thepurpose set forth.

2. In an emery grinding-machine, the conibination, with a fixed supportand with a fixed power-shaft and driving-pulley, of a rotatory supportmounted upon and above the fixed support, anda series ofhorizontallydisposed spindles journaled on the rotatory support,carrying grinding-disks and belt-pulleys and adapted to be separatelybrought into line with the driving-pulley by turning' of therotatorysupport and belted to the driving-pulley, substantially as andfor the purpose set forth.

3. In an emery grinding-machine, the combination of a fixed supporthaving the raising and lowering top B, provided with an opening sthrough it, a powe r-shaft carrying a driving-pulley below the openings, a rotatory support upon the top B about the open, ing s, and a seriesof horizontally-disposed spindles journaled on the rotatory support,carrying grinding-disks and belt-pulleys and adapted to be'separatelybrought into line with the opening s by turning of the rotatory support,and belted to the driving-pulley through the said opening, theslackening and tightening of the belt being effected by the lowering andraising, respectively, .of the top B substantiallyas and for the purposeset forth.

4. In an emery grinding-machine, the combination of a fixed support, aring D on the fixed support, a rotatory support mounted on the ring D, afixed power-shaft and drivingpulley, and a series of spindles eachmounted on the rotatory support and carrying a grinding-disk andbelt-pulley and adapted to be connectedin turn to the driving-pulley,substantially as and for the purpose set forth.

5. In an emery grinding-machine, the conibination, with a fixed supportand with a fixed power-shaft and driving-pulley, of a rotatory supportmounted upon the fixed support, a series of horizontally and radiallydisposed spindles journaled on the rotatory support, carrying towardtheir outer ends grinding-disks and toward their inner ends belt-pulleysG and adapted to be separately brought into operative position in linewith the driving-pulley by turning of the rotatory support, and to beconnected in turn at their pulleys G bya belt H to the driving-pulley,and a support Z, adjacent to the operative position of the spindles tohold the belt H when it is not connected with a pulley G', substantiallyas and for the purpose set forth.

6. In an emerygrinding-machine, the colnbination of' a fixed supporthaving the raising and lowering top B and fixed part B, provided with anopening s extending through them, a power-shaft carrying adriving-pulley below the opening s a rotatory support on the top B aboutthe opening s, and a series of horizontally and radially disposedspindles journaled on the rotatory sup- IIO port, carrying toward theirouter ends grinding-disks and toward their inner ends beltpulleys G andadapted to be separately brought into operative position in line withthe driving-pulley by turning of the rotatory support, and to beconnected in turn at their vpulleys G by a belt II to thedriving-pulley,

and a support Z, mounted upon the part B, to extend near the operativeposition of the spindles at their inner ends, whereby the` lowering ofthe top B produces slackening of thev belt on a pulley G, so that thebelt may be transferred to the support Z, and raising of the top B',when the belt is on a pulley G', )roduces tightening of the belt,

substantially as and for the purpose set forth.

7. In an emery grindingmachine, the combination, with the iXed supportA, having the stationary top B, driving-pulley C2, below the top B, beltII, stationary belt-support Z and rotatory support E, carryinghorizontally and radially disposed spindles G, provided withgrinding-disks and belt-pulleys G', of the raising and loweringfoundation B for the rotatory support, hinged toward one edge to the topB, the rock-shaft m, journaled in the support A and carrying one or morecams fm2, upon which the part B rests toward

